Tom,
Thank you for your help with the window balance system. I took one of these out to try and find the stamp on the coil which says 7Y, so I'm assuming that were looking at 7lb coil. My issue is the removal of the tandem spring coil housing. There is no cut out on the window and its made of metal so I'm not sure if your spreader will work.Do you know how to properly remove the coil housing from the window sash?
Thanks for your help!